I am trying to monitor power consumption of jetson nano using TEGRASTATS.I want to know what exactly is shown in tegrastats specilly POM_5V_IN,POM_5V_GPU and POM_5V_CPU.I also want to know what Integrated power consumption monitoring tool is used on jetson nano.
RAM 1698/3965MB (lfb 99x4MB) CPU [16%@921,10%@921,10%@921,11%@921] EMC_FREQ 0% GR3D_FREQ 0% PLL@32.5C CPU@36C PMIC@100C GPU@33.5C AO@42.5C thermal@34.75C POM_5V_IN 2915/2915 POM_5V_GPU 40/40 POM_5V_CPU 319/319
Hi thohtdelta,
Please refer to the details in [url]Welcome — Jetson Linux<br/>Developer Guide 34.1 documentation
Thanks
<VDD_name> X/Y
<VDD_name> is power consumption (mW) for certain module “name”'s rail. X is current value and Y is average value.
This is same for POM_5V_name.
Thanks kayccc
I tried to save the data from tegrastats and ended up saving the whole line.
It will be helpful if i can only save the power and temperature,please tell me where do tegrastats take those values from(like a file?),if so tell me the path.
Hi thohtdelta,
Install the strace package:
Output used files:
You will get something like that:
…
openat(AT_FDCWD, “/sys/bus/i2c/devices/6-0040/iio_device/rail_name_0”, O_RDONLY) = 4
openat(AT_FDCWD, “/sys/bus/i2c/devices/6-0040/iio_device/in_power0_input”, O_RDONLY) = 4
…
openat(AT_FDCWD, “/sys/devices/virtual/thermal/thermal_zone1/temp”, O_RDONLY) = 4
openat(AT_FDCWD, “/sys/devices/virtual/thermal/thermal_zone1/type”, O_RDONLY) = 4
…
Ctrl+C for drop
The file /sys/bus/i2c/devices/6-0040/iio_device/in_power0_input is current POM_5V_IN value
The file /sys/devices/virtual/thermal/thermal_zone1/temp is current CPU-therm value
and so on (/sys/devices/virtual/thermal/thermal_zone1/type is a sensor type as you understood)
That was helpful @fedormelexin,
I also wanted to know one more thing
https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%2520Linux%2520Driver%2520Package%2520Development%2520Guide%2FAppendixTegraStats.html%23wwpID0E0SB0HA
After checking this link i am still confused whether POM_5V_IN is the total power consumed by the whole board or we need to ADD all the three likePOM_5V_IN+POM_5V_GPU+POM_5V_CPU to get the total power consumed the motherboard.
This is the reading we got while the strip camera was running
RAM 1698/3965MB (lfb 99x4MB) CPU [16%@921,10%@921,10%@921,11%@921] EMC_FREQ 0% GR3D_FREQ 0% PLL@32.5C CPU@36C PMIC@100C GPU@33.5C AO@42.5C thermal@34.75C POM_5V_IN 2915/2915 POM_5V_GPU 40/40 POM_5V_CPU 319/319
This is the reading we got while running TensorRT
RAM 3100/3957MB (lfb 18x1MB) SWAP 535/4096MB (cached 22MB) IRAM 0/252kB(lfb 252kB) CPU [79%@1428,100%@1428,81%@1428,83%@1428] EMC_FREQ 22%@1600 GR3D_FREQ 99%@844 APE 25 PLL@44.5C CPU@48.5C PMIC@100C GPU@43.5C AO@51C thermal@46C POM_5V_IN 7700/4490 POM_5V_GPU 2408/523 POM_5V_CPU 1224/613
This sums up to more than 11 watts and sometimes even 13 watts ,thus my doubt.
Is this normal? Will this affect the board if it runs for a long time??
I do not know which option is correct.
Supply 4 Amps at 5 Volts through the Barrel Jack connector is 5V*4A = 20 Watts (MAX). 13 watts seems to be acceptable consumption.
With sufficient cooling, the runs for a long time should not affect the board.
POM_5V_IN measures the overall 5V input to the board, it represents the total power consumption. You don’t need to add POM_5V_GPU and POM_5V_CPU to it. The GPU/CPU rails are provided for extra reference.
–
Just an observation:
Jetson Nano without any peripherals with full CPU (no GPU) load seems to consume aroung 4.5W.
Not sure, but it might be jtop:
Hi @damian.bucha,
yes the monitor is jtop (shared from @Honey_Patouceul)
jtop from release 2.0 have fix the issue in this topic.
Now from jetson nano show properly the total power consumption (in bold POM_5V_IN)
Best,
Raffaello
Thank you very much for the info. I will check it out right away :)
